JP2752515B2 - Equipment used to repair pipe installations, especially sewer pipe installations - Google Patents

Abstract

PCT No. PCT/DK90/00109 Sec. 371 Date Oct. 28, 1991 Sec. 102(e) Date Oct. 28, 1991 PCT Filed Apr. 26, 1990 PCT Pub. No. WO90/12979 PCT Pub. Date Nov. 1, 1990.An apparatus for use in renovating tube systems, in particular, sewer tubes of a circular cross section. The apparatus includes a frame on wheel, with the frame being arranged so as to be moved inside a tube in such a manner that a position of the apparatus in the tube is determined. A motor-driven tool is arranged for cutting away items extending or protruding into the tube and/or for forming side openings in the tube wall or in a tube lining. The motor driven tool is mounted on a carrier arm extending beyond an end part of a rotatable portion of the apparatus. The carrier arm is pivotally connected, opposite the tool, to the rotatable portion at a distance from the end part thereof. An inflatable lifting member is arranged inside the rotatable portion between the end part of the rotatable portion and the pivot axis of the carrier arm. The lifting member is interposed between the rotatable portion and the carrier arm in such a manner that the tool can be moved diametrically within the tube. A turning motor is interposed between the frame and the rotatable portion.

Description

Description: The invention relates to the repair of sewer systems, in particular to sewer systems, and to devices used for repairing sewer systems of the kind set forth in the preamble of claim 1. In the past, previously broken sewers had to be replaced entirely with new sewers, which had a lot of cost and challenging surrounding drilling operations. Today, new repair methods are increasingly being applied, provided that the damaged sewer has the required capacity. In this repair method, a pipe lining consisting of a plastic lining is made in the field on the existing sewer pipe, this plastic lining being formed, for example, by a special method and equipment, with a plastic strip assembled by winding around the inside of the sewer pipe. You. It should be noted that there are several acceptable ways of repairing sewer systems with internal linings.

The prerequisites for applying the new repair method described above are that the existing sewage system can be accurately inspected, prepared and measured, at least as far as the sewage system is inaccessible, as well as the plastic lining must be re-installed. A small portable TV camera is being developed so that the position of the side opening that must be formed can be accurately reproduced.

More particularly, the present invention relates to an apparatus primarily developed for use in repairing drains formed by winding a plastic liner inside an existing drain, for example, in the manner described above. Indeed, devices are known that serve the same purpose, but these known devices are very ugly and complicated in construction and are therefore quite expensive. Moreover, the known devices of the above-mentioned purpose are too large and, in practice, they can only be used for relatively large drains.

EP-A-0 084 427 discloses a device used for repairing sewers, which has a cylindrical shape adapted to be moved in a tube in a manner in which the position of the device in the sewer is known. An apparatus body and a motor driven tool, the motor driven tool being attached to a carrier member, the carrier member protruding from an end portion of the apparatus body, and being rotatable about a longitudinal axis with respect to the apparatus body. Supported as such, on the opposite side of the apparatus body, the carrier member includes a lifting mechanism interposed between the free end of the carrier member and the tool in a manner to diametrically move the tool on the carrier member into the tube. Furthermore, the known device comprises a rotary motor interposed between the device body and the rotatable carrier member.

The object of the invention is to provide a device of the type mentioned at the outset, which uses simple means and a simple and economical arrangement, but which, for example, provides improved accuracy and efficiency in the above-mentioned method of repair. That is.

The device according to the invention, wherein the carrier member is a spring material;
A carrier arm made of, for example, spring steel, the opposite side of the tool being pivotally connected to the rotatable portion at a distance from the end, the lift member being connected to the end of the rotatable portion and the carrier arm. And the rotation axis is perpendicular to the longitudinal rotation axis of the rotatable portion. Thus, an efficient and easy-to-operate device is obtained by simple means, which can be used in a safe and accurate manner utilizing said tool, and by means of the type of tool located at the end of the carrier arm, Any part of the drain wall or pipe lining can be operated in principle. Although the carrier arm itself can be moved diametrically within the tube, the tool on the carrier arm removes the rotatable portion since the carrier arm is further positioned to extend from a portion that is rotatable relative to the frame. By rotating with respect to the frame, it can be moved, for example, along the circumference of the lining wall.

In a preferred embodiment, the device according to the invention is characterized in that the rotatable part comprises a predominantly horizontally positioned hollow cylinder with an elongated upper opening, wherein the carrier arm is connected to the pivot axis at one end of the opening. Extending along and above the opening, and further beyond the end of the cylindrical portion;
The lift member is constituted by an inflatable elastic body disposed inside the cylindrical portion, and the elastic body swings the carrier arm outward by expansion of the elastic body, and removes air from the inflatable body. Cooperates with the carrier arm through the elongated opening to pivot the carrier arm later, the carrier arm preferably being spring-biased towards the inflatable body.

With a view to more easily guiding the radial or diametric movement of the tool and more easily monitoring the engagement area of the tool and the actuation of the end of the carrier arm, the carrier arm is rotated by the tool at the end of the carrier arm. Advantageously, it is bent into a shape which is positioned at the same height or lower than the upper opening of the possible part.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the device according to the present invention.

FIG. 2 is a longitudinal sectional view of a sewer showing the device according to the invention.

FIG. 3 is a cross sectional view of a drain showing a device according to the invention.

FIG. 4 is a perspective view of a preferred embodiment of the device according to the present invention.

FIG. 5 is a partial sectional side view of the rotatable cylindrical portion of the device according to the invention shown in FIG.

As shown, the repair device 2 comprises a frame 4 made of solid steel bars to form a stable base with a low center of gravity.
And the device 2 is provided with wheels 6 on replaceable wheel bogies 8. Therefore, by exchanging the wheel bogies 8 and / or the wheels 6, the device 2 can be simplified insofar as the longitudinal axis of rotation 10 of the device 2 is positioned at a height corresponding to the longitudinal axis of the drain. And from 170mm to 100
Can be equipped to be used to repair 0mm diameter drains.

The frame 4 has a first upright support seat 12 rotatably supporting a portion 14, the portion 14 comprising a cylindrical tube 16, which rotates on the opposite side of the upright support seat 12. Motor 20
The motor 20 is fixed to the frame 4 by an upright bracket 22. The rotary motor 20 is preferably a watertight, reversible low voltage motor, for example a motor of the same type as known rotary motors that rotate a TV antenna by slow rotation of a vertical support tube. This vertical support tube is controlled by a special potentiometer with a so-called dependent scale, ie the rotating motor rotates until the TV antenna has the same direction as the setting of the control scale.

At approximately the same height as the axis of rotation 10, the cylindrical tube 16 has an elongated upper opening 24 formed therein. A carrier arm 28 is rotatably supported on the lateral rotation axis 26 along the rear end of the opening 24, and the arm is positioned over the opening 24 and along the front thereof in front of the apparatus 2. Extend a distance. As shown, the carrier arm 28 bends downward and angularly around the end of the rotatable cylindrical tube 16 so that a motor-driven, preferably pneumatically-driven tool 30 at the end of the carrier arm 28 is connected to the device 2. By swinging the carrier arm with respect to the pipe body 16 from the front position of the sewage pipe to the position of the wall of the sewage pipe, the inside of the sewage pipe can be diametrically moved.

Disposed inside the tube 16 is an inflatable elastic body 32, which is a rigid inflatable cylindrical device normally used to temporarily close the end of the conduit, i.e., air. It is preferably a cylindrical elastic body which can be expanded and packed like a cork at one end of the tube. During the expansion of the elastic body 32, the side of the elastic body is
28 cooperates with the underside of the tube and swings the carrier arm outwardly with respect to the tube 16 so that the air in the elastic body 32 becomes empty again.
Swing to the upper side of 16.

After the pivot axis 26 of the carrier arm 28, a TV camera bracket 34 is provided on the upper side of the pipe body 16, and the TV camera monitors the inside of the drainage pipe in front of the apparatus 2, and the carrier arm 28 and the tool 30 Movement can be controlled. The bracket 34 is provided with an indicator device 36 having a pendulum indicator 38, and the pendulum indicator 38
The given angle of the rotatable part 14 since it is rotatably mounted in front of the center axis of the TV camera and thus the pendulum indicator 38 remains vertical when the part 14 is rotated about the rotation axis 10 The position can be read from an angular scale along the perimeter of the camera lens.

The device 2 may be adapted to be moved along the drain by another wire pulling device with a measuring tape to determine the exact position of the device along the tube. However, the device 2 is provided with a drive motor 40 having friction drive wheels 42, as shown in FIGS. 2 and 3, which are preferably driven by a pneumatic cylinder 44 to the wall of the drain opposite the wheels 6. May be pressed. In this case as well, the actual position along the tube of the device 2 is still determined by the measuring tape.

By rotating the rotatable part 14 about the rotation axis 10 as shown in FIG.
Can be used to act on the inside of the pipe wall, i.e. the sewer pipe, along a range of angles. This angle range of about 300 ° is limited only by the front wheels 6 and the wheel bogies 8. However, in practice, the carrier arm 28 is engaged with the inlet pipe 46 as shown in FIG. 2, and at the same time, the whole apparatus 2 is rotated obliquely to the lower part of the pipe wall while being supported by the wheels 6. By activating the motor 20, the carrier arm 28 can be used for the remaining 60 ° below the drain wall. In this slightly inclined position, the friction drive roller 42
Is very useful for holding the device 2 in a position inside the tube.
In general, it is advantageous for the device to have suitable support rollers that pneumatically abut the "ceiling" of the drain.

Moreover, as shown, the tool 30 comprises a cutting cone of plastic material (industrial nylon). In device 2,
A conventional flat cutting or cutting machine, and a reciprocating saw blade extending the extension of the carrier arm 28, and other suitable tools may be used.

If, according to the main purpose of the invention, the device according to the invention is used for repairing a drain with a partially wound plastic lining, the existing drain is measured and prepared by the device 2. The device 2 is first moved through the sewer to cut out any possible roots and other inwardly projecting parts, such as the pipe stub of the branch, while at the same time the position along the pipe of any branch connection and its angular position. Both accurate measurements and recordings are made by recording on videotape. This videotape is later used to reshape the connection with the branch recorded by a suitable tool, such as a cutting cone as shown, when installing a plastic lining along the inner wall of the sewer. .

As shown in FIGS. 4 and 5, in a preferred embodiment of the sewage robotic device 50 according to the invention, the same reference numbers are used for parts found in both the preferred device 50 and the device 20 according to FIGS. Used. A device 50 dimensioned to operate on a very narrow perimeter, for example a sewer with an internal diameter of about 100 mm, comprises a frame 4 provided with wheels 6 and an inner ballast 52 and a rotary motor 20 (fifth). Figure).
The rotary motor 20 operates a rotatably supported cylindrical part 14, which is connected to a ring-shaped connecting space 56 and
A pressurized air is connected to the frame 4 by means of a special rotating link 54 having 58 and through the ring-shaped connecting spaces 56 and 58 pressurized air is positioned in part on the tool 30 of the carrier arm 28 and partly on the inside of the part 14 inflatable Supplied to body 32. The inflatable body 32 operates the carrier arm 28 via a special actuator section 60 having a compression spring 62. Carrier arm 28
Is hollow so that the supply line 64 of the tool 30 can be protected and passed through the carrier arm 28 from the rotation axis 26 to the external connection stub 66. To facilitate the exchange of the carrier arm 28 with the tool 30, the free end of the supply line 64 is moved by pushing it into the connection fitting 68 to form a ring-shaped connection space 56.
Is linked to A similar push-in fitting 70 connected to the ring-shaped connecting space 58 provides a supply line to the inflatable body 32.
72, which allows the inflatable body 32 to be similarly easily replaced. The rotating link 54 allows the device 50 to be
Continuous rotation can be achieved. That is, the tool 30
Can be operated over the entire 360 ° inner wall of the drain.

On the opposite side of the rotatable cylindrical part 14 on the frame 4,
A tube connection 74 of a flexible supply tube 76 is provided through which the air tube 78 and the electrical supply line are led to the hollow part of the frame. The device 50 is not provided with a separate drive motor; instead, the device 50 is adapted to be connected to a camera trolley located in front of the tool 30, the trolley being provided with a drive motor, A trolley can be used as a tug for device 50. In other words, the device 50 can be pulled along the sewer by a pull wire, or the device 50 can be pushed forward in the sewer by the supply tube 76. In addition, the frame 4 is provided with a holding cylinder with an extendable piston 80 for fixing the device 50 to the "ceiling" of the drain in the operating position.

The inflatable body 32 may be replaced with an actuator cylinder positioned like the actuator section 60, thereby reducing the overall length of the device 50 so that the device can operate on a curved drain section.

Claims (8)

(57) [Claims] 1. A device used for repairing pipe installations, especially sewers of circular cross-section, wherein the device body is adapted to be moved in a pipe in a manner in which the position of the device in the drain is known. A frame (4) on wheels (6) and an end of a part (14) of the device supported rotatably about the longitudinal axis of the device relative to the device body or frame (4); The motor-driven tool (30) attached to the carrier member protruding beyond the
A carrier member (28) made of spring material, for example spring steel, comprising a tool (30) and a tool (30). The opposite side is pivotally connected to the rotatable portion (14) at a distance from the end, the lift member (32) being adapted to rotate the end of the rotatable portion (14) and the carrier arm (28). A device interposed between a moving axis (26) and the rotation axis (26) being perpendicular to the longitudinal rotation axis of the rotatable part (14). 2. The rotatable part (14) comprises a mainly horizontally positioned hollow cylinder (16) having an elongated upper opening (24) formed therein, said carrier arm (28) being provided with an opening ( The lift member extends from the pivot axis (26) at one end of the cylindrical member (16) over and along the opening (24), and further beyond the end of the cylindrical portion (16). 16) an expandable elastic body (32) arranged inside the elastic body, the elastic body swings the carrier arm outward by the expansion of the elastic body (32), and expands from the expandable body (32). The carrier arm (28) preferably cooperates with the carrier arm (28) through an elongated opening (24) so that the carrier arm (28) is swung later by bleeding air.
2. The device according to claim 1, wherein the device is spring-biased towards 2). 3. The carrier arm (28) is positioned such that the tool (30) at the end of the carrier arm (28) is at the same height or lower than the upper opening (24) of the rotatable part (14). 3. The device according to claim 1, wherein the device is bent into a shape. 4. The motor-driven tool (30) is preferably pneumatically driven, provided with a rotary cutting machine, the cutting surface of which is parallel to the carrier arm (28), ie perpendicular to the radial direction of the tube. The device according to any one of claims 1 to 3, wherein the device runs. 5. The motor-driven tool (30) is preferably pneumatically driven, provided with a rotary cutting cone, the axis of rotation of which is perpendicular to the carrier arm (28), ie along the radial plane of the tube. Apparatus according to any one of claims 1 to 3, wherein the apparatus extends. 6. The motor-driven tool (30) is preferably pneumatically driven and is provided with a reciprocating saw blade, which extends parallel to and extends the carrier arm (28).
Apparatus according to any of claims 1 to 3, characterized in that: 7. The rotary motor (20) is preferably a low voltage electric motor, the motor being watertightly enclosed,
And the rotatable part (14) is 360
The device according to any one of claims 1 to 3, wherein the device is arranged so as to be able to rotate by an angle. 8. A drive motor (40), preferably disposed opposite the carrier arm (28), having a friction drive roller (42), wherein the friction drive roller is a pneumatic cylinder (44).
8. A device according to any of claims 1 to 7, characterized in that the device is arranged to be pressed against the wall of the sewer and is spring biased away from the wall of the sewer. .